When the organizers of National Grammar Day in the U.S. decided to set it on March 4th, they did so because of a linguistic oddity. The date happens to come across as a command: march forth. It’s the only date on the calendar that, when said aloud, also acts as a full sentence.
This peculiarity sent me down a grammatical rabbit hole, into the world of capitonyms and heterographs, heteronyms and homonyms, homophones and homographs, and contronyms and polysemes. In honour of March 4th and Grammar Day, let’s march forth through these categories of words.
Capitonyms
March (the month) and march (going forward in a steady beat) are prime examples of words whose meaning changes depending on whether they’re capitalized or lowercase. Two other months fit this category: May and may (the modal verb), and August and august (majestic).
Other examples: Hamlet (the play) and hamlet (small town); Herb (the name) and herb (the plant); Polish (someone from Poland) and polish (to shine); Turkey (the country) and turkey (the bird); China (the country) and china (the tableware); and Scotch (the whisky) and scotch (put an end to something).
Heterographs
What do grammar nerds say when they want to soothe someone? “There, they’re, their.”
These are words sound the same but have a different meaning and spelling. Examples: to/too/two; peek/peak/pique; right/write; sea/see; flower/flour; peace/piece; break/brake; pair/pear/pare; meet/meat; knight/night. A heterograph is a type of homophone.
Heteronyms
While heterographs are spelled differently, heteronyms have the same spelling but different pronunciations and different meanings.
Examples: lead (to guide or the metal); tear (a rip or a cry); wind (moving air or to turn); minute (tiny or the time period); and bass (low-pitched or the fish). Heteronyms are a type of homograph.
Homonyms
These have the same spelling and pronunciation but different meanings: bat (the animal or the baseball equipment); bank (the financial institution or the side of a river); bark (dog sound or tree covering); or lie (tell a falsehood or recline).
The combo of March/march doesn’t count as a homonym, even though they’re spelled and pronounced the same, as the capitalization counts as a distinction. In the modern definition, homonyms are both homophones and homographs.
Contronyms
Meet the double agents of the dictionary. Contronyms, also known as auto-antonyms, are words that mean their own opposite depending on the context.
Consider: sanction (to approve or to penalize); dust (to remove dust or sprinkle dust); clip (to attach or cut off); or oversight (supervision or an error due to lack of supervision). Use them carelessly, and everything changes. It’s a built-in plot twist.
Polysemes
Finally, we come to shape-shifter words with family ties. These are words with multiple meanings but a conceptual link (unlike homonyms, where the meanings are unrelated).
Organizations have branches. Books have leaves. Rivers have mouths. Clocks have hands. Tables have legs. And mountains have feet. Some words don’t split, they, well, branch.
So for anyone who loves language, be ready to tear into it without shedding a tear. Words matter, and the more we grasp their double or triple lives, and all the soundalikes and lookalikes, the more clearly we can communicate.
Take a peek at the meanings, and you just might reach the peak of grammar. If this piqued your interest, I’ll consider it a write/right success. Now it’s time to say knight/night.
Stuart Foxman is a Toronto-based freelance writer, who helps clients’ products, services, ideas and organizations to come alive. Connect with me here on LinkedIn, or check me out at foxmancommunications.com where I share these blogs too. More original posts coming regularly about communications, information, motivation, writing, branding, creativity, media, marketing, persuasion, messages, learning, etc.
March 4, 2026